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首页> 外文期刊>Journal of liquid chromatography and related technologies >Separation of sulphur compounds from vacuum gas oil distillates by ligand exchange chromatography
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Separation of sulphur compounds from vacuum gas oil distillates by ligand exchange chromatography

机译：配体交换色谱法从真空粗柴油馏分中分离出硫化物

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摘要

For characterizing the sulphur components present in vacuum gas oil (VGO) distillates, it is essential to develop and standardize a procedure to separate the sulphur components present in the fraction before applying any techniques for structural elucidation. Ligand exchange chromatography (LEC) has been reported for the separation of sulphur compounds (SCs) from petroleum distillates and shale oil. Therefore, in the present study, the LEC technique was applied using four metals: Cu++, Ag+, Hg++, and Pd++. These metal salts (5 wt%) were impregnated onto grade-12 silica gel in aqueous phase or in dichloromethane. All of them were tested to form complexes with different types of SC in subfractions of VGO from Kuwaiti crude oils. The efficiency of the ions in separating the SCs, was in the order of PdCl2 (aqueous) < AgNO3 < HgCl2 < CuSO4 < PdCl2(dichloromethane). Palladium chloride impregnated over grade 12 silica gel in aqueous phase was very effective in separating the SCs from complex mixtures of aromatics. The methodology was optimized, and it was found that a 30: 1 ratio of the adsorbent to the sample was effective for the separation of SCs.
机译：为了表征真空瓦斯油（VGO）馏出物中存在的硫组分，在应用任何结构阐明技术之前，必须开发并标准化一种程序来分离馏分中存在的硫组分。据报道，配体交换色谱法（LEC）用于从石油馏出物和页岩油中分离硫化合物（SCs）。因此，在本研究中，LEC技术使用了四种金属：Cu ++ ，Ag + ，Hg ++ 和Pd ++ 。将这些金属盐（5重量％）在水相或二氯甲烷中浸渍到12级硅胶上。对所有这些化合物进行了测试，以形成来自科威特原油的VGO子馏分中具有不同类型SC的络合物。离子分离SC的效率约为PdCl 2 （水溶液） 3 2 4 2 （二氯甲烷）。在水相中浸渍在12级硅胶上的氯化钯在从芳香族化合物的复杂混合物中分离SC方面非常有效。对方法进行了优化，发现吸附剂与样品的比例为30：1可以有效分离SC。

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